Carburetor



Oct. 22, 1935. E. A. WILEY 2,018,168

CARBURETOR Filed Feb. 17, 1934 2 Sheets-Sheet l ham ,4 T Tom 15X E. A. \MLEY 2,018,168

CARBURETOR Filed Feb. 17, 1954 2 Sheets-Sheet 2 /11110141111111.1141111%4amumm,

Ill l l llll Lll lll V- U V an outlet pipe H.

Patented Oct. 22, 1935 UNITED STATES PATENT OFFICE I CARBURETOR fornia Application February 17, 1934, Serial No. 711,684

7 Claims.

This invention relates to a carburetor for internal combustion engines of the ignition type, and particularly, to a carburetor utilizing low gravity fuels.

An object of my invention is to provide a carburetor in which the quantity of fuel admitted into the carburetor is controlled in a novel manner.

Another object is to provide a novel means of controlling the quantity of inert gas which is fed into the carburetor.

Still another object is to provide a novel means of controlling the branch manifold so that either gasoline or low gravity fuels are admitted to the engine.

Other objects, advantages and features of invention may appear from the accompanying drawings, the subjoined detailed description and the appended claims.

In the drawings Figure 1 is a side elevation of my carburetor assembly.

Figure 2 is an end view of the low gravity fuel carburetor.

Figure 3 is a transverse, sectional view of the low gravity fuel carburetor and the branch manifold.

Figure 4 is an enlarged fragmentary, vertical, sectional view of the fuel nozzle.

Referring more particularly to the drawings, the numeral l indicates a branch manifold, to one side of which a gasoline carburetor 2of usual and well known designis attached, and to the other side a low gravity fuel carburetor 3. The branch manifold I is connected to a sleeve 4 which sleeve is, in turn, attached to the intake manifold of the engine (not shown).

A port 5 in the sleeve 4 is connected to a pipe extending from the exhaust manifold of the engine so that hot gases are fed into an annular heating chamber 6. A plurality of ribs I extend into the central gas passage 8 of the sleeve 4, thereby heating the incoming combustible gases prior to their admission into the engine.

A heating jacket 9 surrounds the portion of the branch manifold I to which the carburetor 3 is attached, and hot exhaust gases move thru the jacket 9 so as to heat one portion of the branch manifold. The carburetor 3 is provided with an outer heating jacket H! which jacket extends to A valve I2 is provided in the pipe H and controls the opening thereof. This valve is thermostatically controlled by the fol lowing arrangement:

An arm I3 is secured to the shaft M of the valve I 2. A cylinder I5 is provided with a piston l6, and the rod I 'I--attached to the piston-is pivotally secured to the arm I 3. A pipe l8 extends from the cylinder I5 to a thermostatic bowl I 9 in the jacket 9. The bowl l9 and the pipe l8 are filled with expansible fluid and as the temperature of the bowl l9 increases, the fluid will expand, thus moving the piston l6 downwardly and thereby opening the valve l2. When the carburetor is cold, the valve l2 will be closed and the hot gases from the exhaust will circulate around the carburetor 3 and a portion of the branch manifold I. As soon as the parts have become heated, the valve I2 will open and the temperature of the carburetor 3 and branch manifold l willremain substantially constant.

The engine is started with the gasoline carburetor 2. To prevent the gasoline from passing over into the carburetor 3, I provide a swing valve 20 in the branch manifold I. This valve is preferably pivoted at the bottom, as shown in Fig. 3,

.and is adapted to swing to either side so as to open or close one side or the other of the branch manifold. The valve 20 will swing to either side, depending on whether the throttle valve of the gasoline carburetor, or the fuel oil carburetor is open. I

The fuel oil carburetor 3 comprises a bowl 2 I, in the center of which an air intake passage 22 is formed. An annular fuel chamber 23 is provided in the bowl 2| and fuel oil is fed into this chamber thru the pipe 24.

A venturi 25 is formed in the air passage 22 and fuel jets 26 extend thru the venturi. The venturi 25 is formed with an upwardly extending lip 21. v This lip extends upwardly and inwardly for the purpose of creating a partial vacuum irnmediately back of said lip. An annular vacuum port 28 is formed in the bowl 2| and surrounds the air intake passage 22.

A plurality of ducts 29 extend from the vacuum port 28 to the lip 21. Thus, a partial vacuum is created in the vacuum port. A fuel nozzle 30 is fitted in the side of the bowl 2| and comprises a sleeve 3i fixedly mounted in the bowl. This sleeve has a seat 32 at the inner end thereof, the purpose of which will be subsequently described.

A valve 33 screws into the sleeve 3!, and the end of the valve is tapered so as to fit against the seat 32. By rotating the valve 33, it is moved longitudinally, thereby adjusting the space between the end of the valve and the seat 32. This controls the quantity of fuel fed into the air passage 22.

A port 34 extends from the fuel chamber 23 7 Vacuum in the port 28.

vide a tube 3! which, screws into the valve 33 A pipe carrying inert gas is attached to the outer end of the tube 31. By'rotating the pipe '31, it

can be adjusted longitudinally so as, to vary the quantity of inert gas which flows therethru. .The

end of the tube ,3! is adjusted relative to the seat 38 on the inside of the valve 33. The valve 33 is adjusted relative to the seat 32 as the throttle valve 39 is opened or closed; The shaft 40 of the throttle valve 39 is connected thru a link 4| to a shaft 42 and from this last shaft, thru a link 43 to an arm 44 secured to said valve. It will be evident that as the throttle valve is manually adjusted, the valve 33 will be moved longitudinally and adjusted relative to the seat 32.

The tube 31 is controlled by the uantity of Avacuum cylinder 45 is mounted on the bowl 2i, and this'cylinder is provided with a piston 46 anda depending rod 41/ The rod 41 is slidably attached to an arm 48 whicharm is, in turn, securedto the tube 31. A bore 49 extends from the vacuum port 28 to the cylinder 45. K Thus, as the vacuum in the port varies with the flow of gases thru' the'passage 22,

. the piston 46 will rise or fall, and thus longitudinally adjust the tube 31.

Having described my invention, I claim:

1. Acarburetor for internal combustion engines comprising a branch manifold adapted to be attached to the engine, a low gravity fuel carburetor secured to one end of said branch manifold, a gasoline carburetor attached to the other end of said branch manifold, a freelypivoted and automatic swing valve in said branch manifold, said swing valve being adapted and arranged to close the branch manifold to either the low gravity fuel carburetor or the gasoline carburetor, a

heating jacket around said branch manifold.

above the low gravity fuel carburetor and ribs extending inwardly from the heating jacket into the branch manifold whereby gases passing thru the branch manifold are heated; 7

2. A carburetor for low gravity fuels comprising a bowl, said bowl having -a central air passage extending therethru, a throttle valve insaidair passage, a fuel nozzle extending thru the bowl,

a sleeve adjustably mounted in the fuel nozzle whereby the quantity of fuel passing therethru is controlled, means connecting said throttle valve and the sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said last named pipe being longitudinally adjusted to vary the flow of gas therethrmautomatic means connected to said last narned pipe whereby the pipe is adjusted, a

heating jacket surrounding the bowl, an outlet pipe extending from the heating jacket, a valve "in" the outlet pipe, and thermostatically controlled means connected to saidlast named valve whereby the valve is adjusted.

"3 A carburetor for low gravity fuels comprissaga bowl, said bowl having a central air passage extending therethru, a throttle valve in said air passage, a fuel nozzle extending thru the b owl, a sleeve adjustably' mounted in the fuel nozzle whereby the quantity of fuel passing control the flow of gas therethru,

therethru is controlled, means connecting said throttle valve and the sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said inert gas pipe being longitudinally adjustable to automatic means connected to said inert gas pipe whereby said pipe is adjusted, a branch manifold, said low gravity fuel carburetor being attached to one end of the branch manifold, and a swing valve in the branch manifold so adapted and arranged as to close one side or the other of the manifold.

4. A carburetor for low gravity fuels comprising .a bowl, said bowl having a central air pasl5 sage extending therethru, a throttle valve in said air passage, a fuel nozzle extending thru the 'bowl, a sleeve adjustably mounted in the fuel nozzle whereby the quantity of fuel passing therethru is controlled, means connecting said throttle 'valve and the sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said inert gas pipe being longitudinally adjustable to control the flow of gas therethru, and vacuum controlled means connected to said inert gas pipe whereby the pipe is adjusted, a branch manifold, said low gravity fuel carburetor being'at tached' to one end of the branch manifold, and a swing valve in the branch manifold so adapted and arranged as: to close one side or the other of the manifold, V

5. A carburetor for low gravity fuels comprising a bowl, said bowlhavinga central air passage extending therethru, a throttle valve in said air passage, a fuel nozzle extending thru the bowl, a sleeve adjustably mounted in the fuel nozzle whereby the quantity of fuel passing therethru is controlled, and means connecting said throttle valve and the sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said last named pipe being longitudinally adjusted to vary the flow of gas therethru, automatic means. connected to said last named pipe whereby thepipe is adjusted, a branch manifold, said low gravity fuel carburetor being attached to one end of the branch manifold, and a swing valve in the branch manifold so adapted and arranged as to close one side or the other of the manifold.

6. A carburetor for low gravity fuels comprising a bowl, said bowl having a central air passage extending therethru, a throttle valve in said air passage, a fuel nozzle extending thru the bowl, a sleeve adjustably mounted in the fuel nozzle whereby the quantity of fuel passing therethru is controlled, means connecting said throttle valve andthe sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said last named pipe being longitudinally adjusted to vary the flow of gas therethru, automatic means connected to'said last named pipe whereby the pipe is adjusted, a heating jacket surrounding the bowl and an outlet pipe extending from the heating jacket.

7. A carburetor for low gravity fuels comprising a bowl, said bowl having a central air passage extending therethru, a throttle valve in said air passage, a fuel nozzle extending thru 0 the bowl, a sleeve adjustably mounted in the fuel nozzle, whereby the quantity of fuel passing therethru is controlled, means connecting said throttle valve and the sleeve whereby the sleeve is adjusted as the throttle valve is opened and closed, an inert gas pipe in the fuel nozzle, said last named pipe being longitudinally adjusted to vary the flow of gas therethru, automatic means connected to said last named pipe whereby the pipe is adjusted, a heating jacket surrounding the bowl, an outlet pipe extending from the heating jacket, a branch manifold. said low gravity fuel carburetor being attached to one end of the branch manifold, and a swing valve in the branch manifold so adapted. and arranged as to close one side or the other, of the manifold.

EVERETT A. WILEY. 

